package adv1;

/**
 * @author oldliu
 * @since 1.0
 */
public class StringTest2 {
    public static void main(String[] args) {
        String s1="我喜欢java";
        String s2=s1;
        s1=s1.toUpperCase();
        System.out.println("s1="+s1);
        System.out.println("s2="+s2);
    }
}
